Connecting structure for anti-turning wheel of wheelchair
By designing an anti-rollover wheel connection structure for wheelchairs, and utilizing the cooperation of a swing arm and a return spring, the anti-rollover wheel is made to contact the ground when the wheelchair tipes over, solving the problem of increased size of existing wheelchair anti-rollover wheels and improving the compactness and mobility of the wheelchair.
Patent Information
- Application Number
- CN202422191792.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-07
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-09-07
AI Technical Summary
Existing anti-tipping wheels on wheelchairs increase their size, reduce their flexibility, and make them difficult to move in certain situations.
A connecting structure for anti-tipping wheels of wheelchairs was designed, including an upper fixed seat, a swing arm, and a rotating connecting rod. The swing arm is kept in a drooping state by a return spring. When the anti-tipping wheel touches the ground when the wheelchair tipes over, the swing arm drives the anti-tipping wheel to deflect and form a support angle to prevent it from tipping over.
It improves the compactness of the wheelchair, simplifies its structure, prevents the wheelchair from tipping over, and enhances mobility.
Smart Images
Figure CN223516565U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an automatic mechanical field, especially a connecting structure for anti -tipping wheel for wheelchair. BACKGROUND
[0002] The wheelchair is a chair with wheels which can help replace walking, and is an important mobile tool for the sick, the sick, the disabled, home rehabilitation, turnover transportation, medical treatment and outdoor activities.
[0003] The existing wheelchair generally has an anti -tipping wheel, and the existing anti -tipping wheel technology is directly installed one or two outwardly extending fixed wheels for anti -tipping, and the anti -tipping wheel increases the volume of the wheelchair and reduces the flexibility of the wheelchair, which is difficult to move in some scenes. UTILITY MODEL CONTENT
[0004] The utility model discloses a connecting structure for anti -tipping wheel for wheelchair.
[0005] In order to achieve the above-mentioned purpose, the utility model takes the technical scheme that:
[0006] A connecting structure for anti -tipping wheel for wheelchair, including the upper fixed seat and the swing arm, the upper fixed seat's upper end face is fixedly welded with the connector, the lower end surface of the upper fixed seat is fixedly provided with the rotary connection groove, the both sides wall of the rotary connection groove is fixedly provided with the rotary connection hole that passes through the side wall of the upper fixed seat, the rotary connection hole is rotatably connected with the rotary connecting rod, the both ends of the rotary connecting rod pass through the rotary connection hole and are fixedly connected with the limit head, the swing arm upper end's side end surface is fixedly provided with the rotary through -hole, the part of the rotary connecting rod in the rotary connection groove passes through the rotary through -hole and is connected with the swing arm, the swing arm is slidably installed in the rotary connection groove, and the swing arm can swing in the rotary connection groove, and the lower end of the swing arm is fixedly provided with the anti -tipping wheel installation hole.
[0007] Further, the swing arm upper end surface is provided with a swing chamfer, and the inclination angle of the swing chamfer is 30-45 °.
[0008] Further, the swing arm is fixedly provided with an avoidance slot, and the inner wall of the rotary connection groove is fixedly provided with a spring connecting slot.
[0009] Further, the swing angle of the swing arm in the rotary connection groove is 30-45 °.
[0010] Further, a reset spring is sleeved on a section of the outer ring surface of the rotating connecting rod arranged in the rotating connecting groove, one end of the reset spring is clamped in the spring connecting groove, and the other end of the reset spring is clamped in the position avoiding groove.
[0011] Compared with the prior art, the utility model has the beneficial effects that:
[0012] The utility model discloses the swingability of swing arm makes the anti -turning wheel under normal circumstances is in the drooping state, and when the wheelchair will be back to turn, the anti -turning wheel will contact the ground first, and the swing arm is moved to the rear under the influence of the extrusion of the wheelchair and the ground, realizes swing arm to drive the anti -turning wheel and the wheelchair and forms the support angle, simple structure improves the compactness of the wheelchair whole. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 It is the perspective drawing of the utility model;
[0014] Fig. 2 It is the perspective drawing of the utility model's upper fixed seat;
[0015] Fig. 3 It is the perspective drawing of the utility model's swing arm.
[0016] REFERENCE NUMERALS:
[0017] 1. upper fixed seat;2. swing arm;3. connecting head;4. rotating connecting groove;5. rotating connecting hole;6. rotating connecting rod;7. limit head;8. rotating through -hole;9. anti -turning wheel installation hole;10. swing chamfer;11. position avoiding groove;12. reset spring. DETAILED DESCRIPTION
[0018] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.
[0019] See Figs. 1-3As shown, a connecting structure for a roll-preventing wheel of a wheelchair comprises an upper fixing seat 1 and a swing arm 2, a connecting head 3 is fixedly welded on the upper end face of the upper fixing seat 1, a rotating connecting groove 4 is fixedly provided on the lower end face of the upper fixing seat 1, rotating connecting holes 5 penetrating the side wall of the upper fixing seat 1 are fixedly provided on the side walls of the rotating connecting groove 4, a rotating connecting rod 6 is rotatably connected in the rotating connecting holes 5, limiting heads 7 are fixedly connected to the ends of the rotating connecting rod 6 penetrating the rotating connecting holes 5, a rotating through hole 8 is fixedly provided on the side end face of the upper end of the swing arm 2, the part of the rotating connecting rod 6 placed in the rotating connecting groove 4 penetrates the rotating through hole 8 and is connected with the swing arm 2, the swing arm 2 is slidingly installed in the rotating connecting groove 4 and can swing in the rotating connecting groove 4, and a roll-preventing wheel mounting hole 9 is fixedly provided on the lower end of the swing arm 2.
[0020] A return spring 12 is sleeved on the outer ring surface of the part of the rotating connecting rod 6 placed in the rotating connecting groove 4, one end of the return spring 12 is clamped in a spring connecting groove, and the other end of the return spring 12 is clamped in the position avoiding groove 11.
[0021] The swing arm 2 is kept in place by the return spring 12, the angle of the swing arm 2 in place is such that the swing arm 2 is in a drooping state, when the wheelchair is about to be rolled backward, the roll-preventing wheel mounted on the lower end of the swing arm 2 first contacts the ground, then the swing arm 2 is pressed to cause the swing arm 2 to open outward, the swing arm 2 drives the roll-preventing wheel to deviate to the outside of the wheelchair, so that the swing arm 2 forms a certain angle with the upper fixing seat 1, and the wheelchair cannot be easily rolled backward.
[0022] Of course, the device can also be arranged on other faces of the wheelchair, and the rear side mentioned in the embodiment is only one face of the wheelchair that is most prone to falling.
[0023] A swing chamfer 10 is provided on the upper end face of the swing arm 2, and the angle of the inclined surface of the swing chamfer 10 is 30-45°.
[0024] A position avoiding groove 11 is fixedly provided on the swing arm 2, and a spring connecting groove is fixedly provided on the inner wall of the rotating connecting groove 4.
[0025] The swing angle of the swing arm 2 in the rotating connecting groove 4 is 30-45°.
[0026] The above merely describes a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiment, and any equivalent modification or change made by the ordinary skilled in the art according to the disclosed content of the utility model shall be included in the protection scope recorded in the claims.
Claims
1. A connecting structure for a roll guard wheel for a wheelchair, comprising an upper fixing seat (1) and a swing arm (2), characterized in that: The upper end surface of the upper fixing base (1) is fixedly welded with a connecting head (3), the lower end surface of the upper fixing base (1) is fixedly provided with a rotary connecting groove (4), both side walls of the rotary connecting groove (4) are fixedly provided with rotary connecting holes (5) penetrating the side wall of the upper fixing base (1), a rotary connecting rod (6) is rotatably connected in the rotary connecting hole (5), both ends of the rotary connecting rod (6) penetrate the rotary connecting hole (5) and are fixedly connected with limit heads (7), the side end surface of the upper end of the swing arm (2) is fixedly provided with a rotary through hole (8), the part of the rotary connecting rod (6) in the rotary connecting groove (4) penetrates the rotary through hole (8) and is connected with the swing arm (2), the swing arm (2) is slidably installed in the rotary connecting groove (4), and the swing arm (2) can swing in the rotary connecting groove (4), the lower end of the swing arm (2) is fixedly provided with an anti-tipping wheel mounting hole (9).
2. The connecting structure for the anti-tip wheel of a wheelchair according to claim 1, characterized in that: The upper end surface of the swing arm (2) is provided with a swing chamfer (10), and the inclination angle of the swing chamfer (10) is 30-45°.
3. The connecting structure for the anti-tip wheel of a wheelchair according to claim 1, characterized in that: The swing arm (2) is fixedly provided with an avoiding groove (11), and the inner wall of the rotary connecting groove (4) is fixedly provided with a spring connecting groove.
4. The connecting structure for the anti-tip wheel of a wheelchair according to claim 1, characterized in that: The swing angle of the swing arm (2) in the rotary connecting groove (4) is 30-45°.
5. The connecting structure for the anti-tip wheel of a wheelchair according to claim 1, characterized in that: A section of the rotary connecting rod (6) in the rotary connecting groove (4) is sleeved with a reset spring (12) on the outer ring surface, one end of the reset spring (12) is clamped in the spring connecting groove, and the other end of the reset spring (12) is clamped in the avoiding groove (11).